Abstract:
The present invention is a composite material which is improved for use in places like piston, brake disc and brake linings where friction is densely existing and comprising a metal based material used as matrix and a ceramic based material used as support element inside said metal based material and whose abrasion resistance is increased and at the same time, whose clutching capability is improved, characterized by comprising; SiC, as the ceramic based material, which is solidified in sponge form by means of the copying method; coating material which can form chemical binding with the metals and which is placed to the surfaces of said silicium carbide (SiC) structure which is solidified in sponge form by means of application of coating with no current; an aluminum (Al) alloy positioned at the pores of the SiC structure which is solidified in sponge form by binding to said coating material and at the same time which encircles the structure of SiC and which is a metal based material.
Abstract:
Method for making a ceramic matrix material for brake friction components, in particular disc brakes, consisting of the following operational phases: a) prepare a mixture of at least one siliconic type ceramic precursor, particles of hard materials suitable as abrasives, particles of substances suitable as lubricants and particles of metal materials; b) hot-press the mixture to obtain a green body; c) submit the green body to a process of pyrolysis in order to achieve ceramisation of the preceramic binder, thus obtaining a ceramic matrix material. The invention is distinguished by the fact that the mixture includes a catalyst suitable for favouring reticulation of the ceramic precursor during the hot-pressing phase and by the fact that the pyrolysis process is carried out at temperatures below 800°C, more precisely between 400°C and 600°C.
Abstract:
Die Erfindung betrifft einen Metall-Keramik-Verbundwerkstoff insbesondere für tribologische Anwendungen, aufweisend eine Preform aus einem Keramikwerkstoff, und als Metallkomponente Kupfer oder eine Kupferlegierung, wobei der Keramikanteil im Bereich zwischen einschließlich 30 und 80 Vol.-% und der Anteil des Kupfers oder der Kupferlegierung im Bereich zwischen einschließlich 20 und 70 Vol.-% liegt.
Abstract:
Brake rotors whose characteristics allow for use in vehicles driven on streets, roads and highways, for road race applications or even for general racing and general driving, having a braking surface comprising zirconium oxide and chromium carbide.
Abstract:
Es wird ein Verfahren zur Herstellung eines Verbundbauteils, insbesondere einer Bremsscheibe, sowie ein metall-keramisches Bauteil vorgeschlagen. Bei dem Verfahren wird ein poröser keramischer Vorkörper hergestellt und mit einer Metallschmelze infiltriert. Erfindungsgemäss wird bei der Infiltration als Metallschmelze eine Legierung aus Kupfer und mindestens einem weiteren Metall eingesetzt, wobei das weitere Metall mit mindestens einem reaktiven Bestandteil des Vorkörpers so umgesetzt wird, dass ein Porenraum einer keramischen Phase von im Wesentlichen reinem Kupfer ausgefüllt wird.
Abstract:
Eine Reibpaarung für eine Synchronisiereinrichtung in Zahnräderwechselgetriebe verwendet einen kegelförmigen Reibkörper, der aus einem Eisenwerkstoff besteht, wobei dieser Eisenwerkstoff in erfindungsgemäßer Weise eine Härte von 180 bis 350 HV aufweist.
Abstract:
The invention relates to a multiple disk in oil bath clutch that comprises a drive element (2) and an output element (3), and first disks (22) linked with the drive element (2) or the output element (3), and second disks (21) that can be compressed by means of an actuator (24). The aim of the invention is to provide a vibration-reduced and long-life tribological system. To this end, the first disks (22) consist of steel and their friction surfaces are configured as linings (42) that consist of carbon fibers embedded in a carbon matrix and channels (43) extending from the interior towards the exterior. The second disks (21) consist of steel and their friction surfaces are lined with a nickel dispersion layer.
Abstract:
In order to produce a metal-ceramic brake disc, a powder mixture in powdered or pre-solidified form is applied to at least one side of a metallic support body. Said powder mixture contains the following as basic components: a) aluminium and/or powdered aluminium alloy with an average particle size of at least 5 mu m, b) ceramic and/or elemental powder, capable of reacting with aluminium to form aluminide and in addition, optionally c) inert powder which does not react with aluminium under the pressure and temperature conditions used. The powder mixture is then compacted onto the support body using a pressure of between 1 and 100 MPa, at a reaction temperature which is at least sufficient to melt the aluminium powder particles, until a metallic matrix has formed, containing at least 20 % volume aluminide, in which the Al2O3 and/or AIN produced is finely distributed and which adheres firmly to the support body.
Abstract:
A friction member produced by mixing metal binder powders, at least one lubricant and fillers in the form of hard particles, then shaping and sintering the mixture. Powders with a particle size no greater than 250 microns are used at least for the metal binder and the hard particles, and the shaped powder mixture is subjected to a first sintering step followed by a hot forging step and a second sintering step. The friction member is particularly suitable for producing brake pads combined with brake discs made of different materials such as steel, aluminium, carbon-carbon composites, composites with a metal or ceramic matrix or, in particular, silicide carbon-carbon composites, in rail vehicle braking systems.